参数资料
型号: LTC2481IDD#TRPBF
厂商: Linear Technology
文件页数: 2/40页
文件大小: 0K
描述: IC ADC 16BIT I2C 10-DFN
标准包装: 2,500
位数: 16
采样率(每秒): 7.5
数据接口: I²C,串行,SPI?
转换器数目: 1
功率耗散(最大): 480µW
电压电源: 单电源
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-WFDFN 裸露焊盘
供应商设备封装: 10-DFN(3x3)
包装: 带卷 (TR)
输入数目和类型: 2 个单端,双极;1 个差分,双极
配用: DC951A-ND - BOARD DELTA SIGMA ADC LTC2481
LTC2481
10
2481fc
PIN FUNCTIONS
REF+ (Pin 1), REF(Pin 3): Differential Reference Input.
The voltage on these pins can have any value between
GND and VCC as long as the reference positive input,
REF+, is more positive than the reference negative input,
REF, by at least 0.1V.
VCC (Pin 2): Positive Supply Voltage. Bypass to GND
(Pin 8) with a 1μF tantalum capacitor in parallel with 0.1μF
ceramic capacitor as close to the part as possible.
IN+ (Pin 4), IN(Pin 5):
Differential Analog Input. The
voltage on these pins can have any value between GND
– 0.3V and VCC + 0.3V. Within these limits the converter
bipolar input range (VIN = IN+ – IN) extends from –0.5
VREF /GAIN to 0.5 VREF/GAIN. Outside this input
range the converter produces unique overrange and
underrange output codes.
TYPICAL PERFORMANCE CHARACTERISTICS
PSRR vs Frequency at VCC
(2x Speed Mode)
PSRR vs Frequency at VCC
(2x Speed Mode)
Offset Error vs VCC
(2x Speed Mode)
Offset Error vs VREF
(2x Speed Mode)
PSRR vs Frequency at VCC
(2x Speed Mode)
VCC (V)
2.7
0
OFFSET
ERROR
V)
100
250
3
4
4.5
2481 G36
50
200
150
3.5
5
5.5
VREF = 2.5V
VIN = 0V
VIN(CM) = GND
TA = 25°C
VREF (V)
0
OFFSET
ERROR
V)
190
200
210
3
5
2481 G37
180
170
160
12
4
220
230
240
VCC = 5V
VIN = 0V
VIN(CM) = GND
TA = 25°C
FREQUENCY AT VCC (Hz)
1
0
–20
–40
–60
–80
–100
–120
–140
1k
100k
2481 G38
10
100
10k
1M
REJECTION
(dB)
VCC = 4.1V DC
REF+ = 2.5V
REF= GND
IN+ = GND
IN= GND
TA = 25°C
FREQUENCY AT VCC (Hz)
0
–140
RREJECTION
(dB)
–120
–80
–60
–40
0
20
100
140
2481 G39
–100
–20
80
180
220
200
40 60
120
160
VCC = 4.1V DC ±1.4V
REF+ = 2.5V
REF= GND
IN+ = GND
IN= GND
TA = 25°C
FREQUENCY AT VCC (Hz)
30600
–60
–40
0
30750
2481 G40
–80
–100
30650
30700
30800
–120
–140
–20
REJECTION
(dB)
VCC = 4.1V DC ±0.7V
REF+ = 2.5V
REF= GND
IN+ = GND
IN= GND
TA = 25°C
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